http://ir.library.ui.edu.ng/handle/123456789/473 scholarly Sat, 27 Sep 2025 08:18:49 GMT 2025-09-27T08:18:49Z http://ir.library.ui.edu.ng/handle/123456789/8403 Title: Computer aided design (CAD) of a vertical transportation system in high-rise building: case of ivory tower, University of Ibadan, Ibadan Authors: Odunfa, K. M.; Taiwo, O. I.; Odunfa, V. O.; Abu, R. Abstract: In compliance with the global building regulations, building with at least three floors and above must have lift. The Ivory Tower building in the University of Ibadan, Ibadan, Nigeria, for decades has been underutilized due to lack of convenient and less stressful vertical movement of the people within the building. The need therefore arise for the lift design system for the building. Analytical work involves in the design of lift system in building is often time consuming, laborious, rigorous and tedious. This work therefore aims at design and specifies lift system for the Ivory tower building using Computer Aided Design (CAD) approach. Standard Equation based on the lift system design was adopted in the study. Data were collected from the building site which includes the floor to floor distances and floor dimensions. The population in the 10-Storey Ivory tower building coupled with the 4 Storey Administrative building attached to it was determined using the Chartered Institute of Building Services Engineers (CIBSE) design guide (Peters R D Green 1995 and CIBSE 1991). Lift performance analysis for the building was then carried out using FORTRAN IV programming language. Appropriate and suitable lift and its specifications was then selected for the building. The maximum capacity, number of passengers, velocity, Round Trip Time, Handling Capacity, Interval, and number of lift cars of the selected lift system based on the quality of service are 450kg, 6 passengers, 2.0 m/s, 80.3seconds, 86 passengers, 17.54 seconds and 4 cars, respectively. The lift system therefore selected based on the required quality of services is four numbers 450kg-6passengers machine room less geared traction type. The lift shaft was successfully designed and the number of lift specified using the developed source code; hence the code can be used to design lift system for any building. Wed, 01 Jan 2020 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/8403 2020-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/8402 Title: Comparison of compromise constraint bi-objective LP method and three traditional weighted criteria methods Authors: Adeyeye, A. D.; Arise, O. T.; Charles-Owaba, O. E. Wed, 01 Jan 2020 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/8402 2020-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/8401 Title: Evaluation of mechanical strain resulting from working with two locally fabricated engine powered stationary grain thresher Authors: Akanbi, O.G.; Afolabi, B.O. Abstract: In place of the combine harvesters, stationary grain threshers are the most common among the farmers in the developing countries, many are being produced locally to meet up with the local demands by the farmers which they find to be relatively cheap and affordable. To ascertain the level of their user friendliness, two threshers of heights 92 cm (M1) and 161.5 cm (M2) with capacities 3000kg/hr. and 6500kg/hr. respectively were selected for evaluation to determine the possible biomechanical strain that may result from working with these locally fabricated threshers. Questionnaire and physical measurements were employed for data collection of thirteen randomly selected operators, with ages ranged in-between 20 and 35 years. The results of machine performance tests showed that quantity threshed on average ± SD per minute are 12.59kg ± 2.41 (M1) and 20.38kg ± 3.84 (M2),corresponded to the mean (SD) of weight per lift of 1.75kg (0.44) and 2.06 (0.22), and mean; SD of frequency of lift/minute of 7lift/min;1.59 and 10lift/min;1.81. The body kinematics analysis showed flexion, extension, lateral deviation and abduction with respective highest mean values of 167.750 at kneel (M1), 111.500 at ankle (M1), 24.750 at neck (M2) and 72.000 at shoulder (M2) at the end of lift. Regression analysis of biomechanical parameters, and frequency of lift and weight per lift gave F-value of 425.987 (R2 =0.974), which shows no relationship at α= 0.01. Subjects’ indications of body parts discomforts showed highest percentages of 78.3%; 84.6% and 72.9%; 80.8% for M1; M2 at shoulder and lower back respectively. Conclusively, the overall result showed that the two machines need to be ergonomically modified to prevent the users from the risk of musculoskeletal disorder (MD). Wed, 01 Jan 2020 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/8401 2020-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/8400 Title: Garment sizing system: a critical review of the past, present and future Authors: Opaleye, A. A.; Kolawole, A. Wed, 01 Jan 2020 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/8400 2020-01-01T00:00:00Z